Analysis of wind-induced vibration response characteristics of multispan double-layer cable photovoltaic support structure

Abstract

To investigate the wind-induced vibration response characteristics of multispan double-layer cable photovoltaic (PV) support structures, wind tunnel tests using an aeroelastic model were carried out to obtain the wind-induced vibration response data of a three-span four-row double-layer cable PV support system. The wind-induced vibration characteristics with different PV module tilt angles, wind speeds, and wind direction angles were analyzed. The results showed that the double-layer cable large-span flexible PV support can effectively control the wind-induced vibration response and prevent the occurrence of flutter under strong wind conditions. The maximum value of the wind-induced vibration displacement of the flexible PV support system occurs in the windward first row. The upstream module has a significant shading effect on the downstream module, with a maximum effect of 23%. The most unfavorable wind direction angles of the structure are 0° and 180°. The change of the wind direction angle in the range of 0° to 30° has little effect on the wind vibration response. The change in the tilt angle of the PV modules has a greater impact on the wind vibration in the downwind direction and a smaller impact in the upwind direction. Special attention should be paid to the structural wind-resistant design of such systems in the upwind side span.

Keywords

double-layer cable / photovoltaic support / aeroelastic model / wind tunnel test / wind-induced vibration response

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Funding

The National Natural Science Foundation of China(52338011)